The reason for this is that vampires are the only special race that can gain strength by 'killing', and they are still a group of races that must use humans as 'food' to sustain their lives.

Vampires live on human blood. Just as human beings need to eat, they need to eat, they need to absorb the nutrients in food to sustain themselves. Except for a very small number of special, high-level vampires, such as Evan and Shinobi, they can still survive without relying on human blood. If ordinary vampires do not suck human blood for a long time, they will gradually become weak and die completely, just like humans who have not eaten for a long time.

It's not wrong to say that vampires are a cursed race. The more low-level vampires need more blood, and the more difficult it is to suppress their physiological desire for blood. Humans who are attacked by low-level vampires will almost invariably die of blood exhaustion. Only when a vampire survives long enough and is strong enough can they gradually reduce their desire for blood and their physical needs. It's like Kaguya also mentioned a pair of vampire sisters she met when she was in Gensokyo. The sisters just added a little blood to their favorite black tea every day, enough to satisfy their vampire instincts. And with such a small amount of use, let alone killing, it can't even be said to be harmful to people's bodies. After all, from the perspective of modern medicine, at least from the perspective of modern medicine in articles that encourage everyone to donate blood, regularly drawing a certain amount of blood has all kinds of benefits for the human body.

However, even those vampires who have gained enough strength to resist their instincts to 'stop killing' have mostly 'evolved' from the bottom and trampled on countless human corpses to the heights they have now. This practice of using humans as food is not much different from magicians or human cannibalism. However, human beings are already highly intelligent creatures with a tendency towards sensibility, and this difference in concept and meaning alone is enough to make humans treat such beings as unforgivable demons for such beings as vampires.

Although humans also keep other animals in captivity and determine their fate as food from birth. But because of this, what kind of existence treats themselves with the same treatment, but they are even more unacceptable and tolerated.

What's more, for magicians, magicians and other supernatural beings, vampires sucking human blood is not just a simple act of eating. Although there are different factors such as bloodline and aptitude, the individual differences among vampires are quite large. However, vampires are able to gain power from it by sucking blood, which is basically one of the special abilities that vampires are born with.

Treat yourself as food, and you can also gain the power you have. This suddenly made the vampire even more intolerant of the vast majority of other abilities. This is just like for martial artists, the martial arts that were once said to exist to be able to absorb the power of others to strengthen themselves are undoubtedly evil ways. As for magicians, those who can absorb the magic of others and copy the unique secret methods of others are undoubtedly falling into the evil path.

Evil ways must be punished, even if many of the Adepts themselves are not very decent at all. And the Red World Apostle, a monster that can directly regard the 'existence' of others as food and their own strength, and they can only rely on this power of existence to survive, once others learn of their existence, they will definitely immediately become the common enemy of the supernatural beings on this earth.

Master the means to harness the power of existence and make yourself one of the poor ones who are considered enemies of the 'whole world'? Levi are not so stupid as to make a big deal for themselves in vain.

"I'm not sure if that happened. ”

Aosaki Orange propped her arms on the table and rubbed her hands on the sides of her head, just like those office workers who wake up the next day after drinking too much and have a headache.

"Ever since I heard you talk about the power of existence, I have a vague feeling as if I have forgotten something. That feeling is like sometimes thinking of one thing, and when I was about to tell someone, I was interrupted by something else, and as a result, I forgot about it when I turned around, and I couldn't remember anything. ”

This situation that Aozaki Orange said is estimated to have been encountered by everyone. Even Alice nodded when she heard this, which shows that not only humans, but also youkai will have the kind of time when they 'clearly say something to their mouths, but suddenly forget it'. Especially people like Levi, who have a bit of memory problems, are the ones who encounter this kind of thing the most.

"Originally, this kind of thing happens a lot, but if it weren't for the fact that I heard you talk about such a thing as the power of existence and the consequences of being devoured, I wouldn't have cared too much about it. Maybe when you suddenly remembered it again?"

"Can you remember who it was?"

Levi asked. Since Aozaki Orange made a special trip to the door, it means that she must have remembered something.

"I still can't remember what it was called or what it looked like, but it was ...... I vaguely remember once having a person in one place who often gave me some information. He doesn't seem to be an intelligence monger, he's just ...... I still can't remember the specifics. ”

Aozaki Orange scratched her hair hard, and the plausible feeling in this memory was very uncomfortable. Except for people like Levi who are used to it, the more capable and intelligent people are, the more annoyed and uncomfortable they feel when they encounter this situation. In the final analysis, this kind of person has long been accustomed to his super memory, and of course there will be a deep sense of frustration when something suddenly goes wrong. It's like the magic trick I'm good at was inexplicably cracked by someone else, and in the end, I didn't find the slightest clue, but found some messy clues, but they all pointed to some completely unknown directions. This is even more unpleasant than a clueless unsolved case.

"And then you go to that place. How does that confirm that you're right?"

In fact, Levi had already verified it with the help of Xana, along with the others. People with a certain degree of abnormal abilities seem to be more sensitive to the existence of the power of existence and the sense of incongruity that arises after its disappearance.